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Time and timekeeping
Clock source
7EN05-0390-00
Time sync source
Meter configuration software (ION Setup)
Energy management system
GPS receiver (IRIG-B)
1
GPS over serial
Simple Network Time Protocol (SNTP)
Network Time Protocol (NTP)
Precision Time Protocol (PTP)
1
Use the digital inputs located on the meter base for IRIG-B time synchronization
and other high-accuracy applications.
2
This clock precision assumes your meter is installed in a Star network topology
only.
The Clock Source setup register defines the meter's representation of a one
second period, and can be set to:
L
F
INE
REQUENCY
The meter monitors the ISO Grid Operation line frequency, and adjusts the one
second period based on the measured line frequency. All devices connected to
the grid network are synchronized to maintain a consistent time base. If a power
outage occurs, the clock automatically synchronizes with the meter's internal
crystal until power is restored. Once power is restored, the clock resynchronizes
with the line frequency.
NOTE: Do not use
LINE FREQUENCY
external time sync source.
I
NTERNAL
The meter clock is synchronized to the meter's internal crystal.
C
OMM
Description
Configuration software can manually
synchronize the time of your meter based on the
clock of the computer running the configuration
software. Configuration software
synchronization is usually performed when the
meter is initially commissioned.
Energy management systems can synchronize
the time of your meter to be consistent with
other meters on the network.
A GPS receiver using IRIG-B can synchronize
the time of a meter up to ± 1 ms of Coordinated
Universal Time (UTC). A dedicated serial
network is required to implement a GPS
scheme. For IRIG-B, one of your meter's digital
inputs must be connected to the IRIG-B
network, and the digital input must be configured
for IRIG-B time synchronization in addition to
configuring your meter's clock.
A GPS receiver can synchronize the time of a
meter up to ± 1 ms of Coordinated Universal
Time (UTC). For GPS over serial, your meter's
serial port must be connected to a GPS receiver,
and the serial port communications must be
configured with the correct protocol setting.
SNTP can synchronize the time of your meter
up to ± 1 second of other meters on an Ethernet
network. For SNTP time synchronization, your
meter must be connected to an Ethernet
network that has an active SNTP server and be
configured with the server's information.
NTP can typically synchronize the time of a
meter to ± 10 to 100 ms, depending on network
configuration. To implement NTP time
synchronization, your meter must be connected
to an Ethernet network that has an active NTP
server and be configured with the server's
information.
2
PTP can synchronize the meter time to ± 1 ms
of other devices connected to a local area
network. To implement PTP time
synchronization, your meter must have PTP
selected as the time sync source and be
connected to an Ethernet network that has a
valid PTP Master (Grandmaster Clock).
when your meter is synchronized to an
175
- Quick Links:
- 9810 Series
- Installation
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Troubleshooting
